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Actuator apparatus and image pickup unit

A technology for a camera unit and a moving lens, which is applied in the fields of instruments, optical components, medical science, etc., can solve the problems of hindering the optical characteristics of the camera unit, and the moving lens frame cannot move forward and backward stably.

Active Publication Date: 2013-05-22
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] For these reasons, especially for the SMA wire when it is not energized, its elongated state shrinks as the temperature rises. Even if the user does not realize it, there are obstacles to the optical characteristics set in the imaging unit, and the movement of the lens Possibility of frame not moving back and forth stably

Method used

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  • Actuator apparatus and image pickup unit
  • Actuator apparatus and image pickup unit
  • Actuator apparatus and image pickup unit

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0055] First, use Figure 1 to Figure 10 The present invention will be described. in addition, Figure 1 to Figure 10 Regarding the first embodiment of the present invention, figure 1 is a block diagram showing the entire electronic endoscope system, figure 2 is a cross-sectional view showing the internal structure of the distal end portion of the endoscope, image 3 is along figure 2 Sectional view of line III-III, Figure 4 is a cross-sectional view showing the structure of the imaging unit, Figure 5 is along Figure 4 A cross-sectional view of the V-V line, Image 6 is a block diagram showing a resistive feedback circuit within a video processor for drive control of a shape memory alloy actuator, Figure 7 It is a cross-sectional view of the imaging unit in which the lens frame is moved to the initial state at the wide-angle end position, Figure 8 is a graph showing the temperature-deformation relationship of a shape memory alloy wire, Figure 9 It is a cross-...

no. 2 approach

[0130] Next, a second embodiment of the present invention will be described below based on FIGS. 11 to 14 (A, B).

[0131] 11 to 14 (A, B) relate to the second embodiment of the present invention. FIG. 11 is a cross-sectional view showing the structure of the imaging unit, and FIG. The sectional view of the camera unit, Figure 13 (A, B) is a sectional view of the camera unit used to explain the effect of the moving lens frame moving to the telephoto end position, Figure 14 (A, B) is a sectional view showing the moving lens frame moving to the telephoto end position Cross-sectional view of the imaging unit in the state of the end position.

[0132] In the following description, the same reference numerals are used for the same configurations as those of the imaging unit 30 of the endoscope system 1 of the first embodiment described above, and detailed descriptions of these configurations are omitted.

[0133] However, in conventional endoscopes that change optical characterist...

no. 3 approach

[0161] Next, a third embodiment of the present invention will be described below based on FIGS. 15(A, B) to 18(A, B).

[0162] Fig. 15 (A, B) ~ Fig. 18 (A, B) relate to the third embodiment of the present invention, Fig. 15 (A, B) is the sectional view showing the structure of the imaging unit, Fig. 17(A, B) is a cross-sectional view of the imaging unit for explaining the effect of moving the moving lens frame to the telephoto end position. Figs. 18 (A, B) is a cross-sectional view showing a state in which a current is applied to the SMA wire again in the state where the moving lens frame has moved to the telephoto end position.

[0163] In the following description, the same reference numerals are used for the same configurations as those of the imaging unit 30 of the endoscope system 1 according to the first and second embodiments described above, and detailed descriptions of these configurations are omitted. In addition, the configuration of the imaging unit of this embodi...

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Abstract

An actuator apparatus 62 of the present invention includes a movable body 32 that is arranged so as to be movable forward or rearward, and a shape memory alloy wire 56 that is provided directly or indirectly to the movable body so as to enter a non-tension state at an ordinary temperature. The shape memory alloy wire 56 is subjected to expansion / contraction control in which an electric current is applied thereto from a power supply portion of an external control circuit portion 100 to change a temperature thereof to a predetermined temperature.

Description

technical field [0001] The present invention relates to an actuator device and an imaging unit for varying the optical characteristics of an objective optical system disposed in an endoscope. Background technique [0002] As is well known, electronic endoscopes are widely used for observation, treatment, etc. inside a living body (inside a body cavity), or for inspection, repair, etc. inside an industrial machine. In recent years, in order to realize the focus function of adjusting the focal point of the photographed image by moving the observation optical system in the direction of the photographing optical axis, or the zoom function of performing wide-angle zoom / telephoto zoom, there are cases of using an imaging unit that can change the focal length. Electronic endoscopy. [0003] For such an imaging unit provided in an endoscope, for example, Japanese Patent Application Laid-Open No. 2007-229155 discloses a technique of changing optical characteristics by moving a movab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B1/00A61B1/04
CPCA61B1/0008A61B1/00188A61B1/0058G02B23/243G02B23/2476
Inventor 岩崎诚二口丸亨石田雄也酒井诚二
Owner OLYMPUS CORP
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